-ic bbb bbc bbd bbe bbi bbo bbt bcb bcc bcd bce bci bco bct bdb bdc bdd bde bdi bdo bdt be- beb bec bed bee bei beo bet bi- bib bic bid bie bii bio bit bob boc bod boe boi boo bot btb btc btd bte bti bto btt c-- cbb cbc cbd cbe cbi cbo cbt ccb ccc ccd cce cci cco cct cdb cdc cdd cde cdi cdo cdt ce- ceb cec ced cee cei ceo cet ci- cib cic cid cie cii cio cit co- cob coc cod coe coi coo cot ctb ctc ctd cte cti cto ctt dbb dbc dbd dbe dbi dbo dbt dcb dcc dcd dce dci dco dct ddb ddc ddd dde ddi ddo ddt de- deb dec ded dee dei deo det di- dib dic did die dii dio dit dob doc dod doe doi doo dot dtb dtc dtd dte dti dto dtt ebb ebc ebd ebe ebi ebo ebt ec- ecb ecc ecd ece eci eco ect ed- edb edc edd ede edi edo edt eeb eec eed eee eeo eet eib eic eid eie eii eio eit eo- eob eoc eod eoe eoi eoo eot etb etc etd ete eti eto ett i-d ibb ibc ibd ibe ibi ibo ibt icb icc icd ice ici ico ict idb idc idd ide idi ido idt ie- iec ied iee iei iet iib iic iid iie iii iio iit io- iob ioc iod ioe ioi ioo iot itb itc itd ite iti ito itt o-i ob- obb obc obd obe obi obo obt oc- ocb occ ocd oci oco oct odb odc odd ode odi odo odt oeb oec oed oee oei oeo oet oib oic oid oie oii oio oit oo- oob ooc ood ooi ooo oot ot- otb otc otd ote oti oto ott tbb tbc tbd tbe tbi tbo tbt tcb tcc tcd tce tci tco tct tdb tdc tdd tde tdi tdo tdt te- teb tec ted tee tei teo tet tib tic tid tie tii tio tit to- tob toc tod toe toi too tot ttb ttc ttd tte tti tto ttt